Home / 2,127.63-2,936.19-1,288.49

Finding the Fourth Proportional to 2,127.63, 2,936.19 and 1,288.49

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Solution

The fourth proportional to 2,127.63, 2,936.19 and 1,288.49 is: 1,778.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.63 : 2,936.19 = 1,288.49 : x
  2. Step 2: Convert to fraction form
    2,127.63/2,936.19 = 1,288.49/x
  3. Step 3: Cross multiply
    2,127.63x = 2,936.19 × 1,288.49
  4. Step 4: Simplify right side
    2,127.63x = 3,783,236.77
  5. Step 5: Solve for x
    x = 3,783,236.77/2,127.63
  6. Step 6: Final answer
    x = 1,778.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.